Linux Date Command: Convert Named Stats Dump Date

Posted on in Categories , last updated March 11, 2010

The rndc stats commands created /var/named/chroot/var/named/data/named_stats.txt file under RHEL 5.x or CentOS 5.x BIND 9 server. However, date is not is correct format. The date is in the following format:
grep ‘Dump’ /var/named/chroot/var/named/data/named_stats.txt
outputs:

+++ Statistics Dump +++ (1263408025)
— Statistics Dump — (1263408025)
+++ Statistics Dump +++ (1263408071)
— Statistics Dump — (1263408071)
+++ Statistics Dump +++ (1268304218)
— Statistics Dump — (1268304218)
+++ Statistics Dump +++ (1268304248)
— Statistics Dump — (1268304248)

How do I convert date (e.g., 1263408025) in a human readable format?

nslookup / host Dns Client Testing Command Not Found on Debian / Ubuntu Linux

Posted on in Categories , , , , last updated January 18, 2008

Q. I’m not able to run nslookup or host command under Debian or Ubuntu Linux. In fact, these commands are missing from my installation. How do I install nslookup and related dns client commands?
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Turn on or enable BIND DNS server logging to see all queries or for troubleshooting problem

Posted on in Categories , , last updated June 26, 2007

Q. How do I turn on DNS server logging so that I can see all the queries on my CentOS 4.0 server?

A. You can use rndc command which controls the operation of a name server. It supersedes the ndc utility that was provided in old BIND releases. If rndc is invoked with no command line options or arguments, it prints a short summary of the supported commands and the available options and their arguments.

rndc communicates with the name server over a TCP connection, sending commands authenticated with digital signatures. In the current versions of rndc and named named the only supported authentication algorithm is HMAC-MD5, which uses a shared secret on each end of the connection. This provides TSIG-style authentication for the command request and the name server\u2019s response. All commands sent over the channel must be signed by a key_id known to the server.

Task: Turn on logging

Type the following command as root to toggle query logging:
# rndc querylog

Task: View bind sever query log

Once this is done, you can view all logged queries usimg /var/log/messages file. To view those queries, type:
# tail -f /var/log/messages

Task: Turn off logging

Type the following command as root to toggle query logging:
# rndc querylog